Machine for embossing seamless knife-handles.



R. E. DEVINE.

MACHINE FOR EMBOSSING SEAMLESS KNIFE HANDLES.

APPLICATION FILED JUNE 1. 1914.

Patented Sept. 28, 1915. 5 F a 23% \f? f I Z v at wow 104411410 RE.EV/NE ROBERT EMMET DEVINE, OF HAMILTON, ONTARIO, CANADA.

MACHINE FOR EMBOSSING SEAMLESS KNIFE-HANDLES.

Specification of Letters Patent.

Patented Sept. 28, 1915.

Application filed June 1, 1914. Serial No. 842,188.

To all whom it may concern Be it known that I, ROBERT EMMET Dn- VINE, ofthe city of Hamilton, in the county of Wentworth, in the Province ofOntario, Canada, have invented certain new and useful Improvements inMachines for Embossing Seamless Knife-Handles, of which the following isthe specification.

My invention relates to improvements in machines for embossing seamlessknife handles, and the object of the invention is to devise anattachment for a hydraulic press which will emboss the seamless knifehandles by hydraulic pressure; a further object is to provide meanswhereby the knife handle will seal itself upon the hydraulic pressurebeing put on the same, thus preventing a leakage of water between thelower part of the ram and the knife handle; a still further object is toprovide means whereby the divided embossing dies will be opened andclosed automatically upon operation of the machine.

-My invention consists of the parts constructed and arranged ashereinafter more particularly described and illustrated in theaccompanying drawings in which Figure 1 represents an elevational viewof a hydraulic press showing my attachment applied thereto. Fig. 2 is aplan view thereof. Fig. 3 is an enlarged vertical sectional view showinga portion of the table of the hydraulic press, the embossing dies andupper ram constructed according to my invention, and also the connectionbetween the water service and the upper ram. Fig. 4 is a furtherenlarged vertical section of an upper ram constructed according to myinvention showing the embossing dies and knife handle in place and themeans where by the knife handle seals itself in the upper ram. Fig. 5 isa plan view of the upper portion of the head of a sleeve in the upperram adapted to allow the escape of air there through. Fig. 6 is afurther enlarged cross sectional view taken through the line w-a' (Fig.4). Fig. 7 is an enlarged vertical section of a conical valve situatedbetween the service and the upper ram. Fig. 8 is a cross sectional viewthereof taken through the line bb' (Fig. 7 Fig. 9 is a vertical sectionof the lower portion of the ram showing a rubber tube inserted into theupper end of the knife handle for preventing the escape of water betweenthe knife handle and the walls of the ram aperture.

Like characters of reference indicate corresponding parts in thedifferent views.

1 is a lower portion of an ordinary hydraulic press.

2 is the head thereof suitably supported on the vertical rods 3.

4 is the lower ram suitably operated by hydraulic pressure.

5 is a suitable portion secured to the head 2.

6 is the upper hydraulic ram constructed according to my invention,saidram having an upwardly extending shank 7 adapted to reciprocate inan aperture 8 in the portion 5.

9, 9 are apertures in the portion 5, and 10, 10 are vertically disposedguiding bolts, each secured at one of its ends to the ram 6 and theother end being provided with a nut 11, said nut being adapted to slidein the aperture 9.

12. is a vertical passage extending up through the shank 7 of the ram 6and provided at its lower end with a conical seat 13.

14 is an enlarged passage in the ram 6 communicating with the passage12.

15 is a conical headed valve adapted to seat on the above referred tovalve seat 13, and having the fiat sided shank 16.

17 is a threaded plug adapted to be screwed into the ram 6 and havingthe central orifice 18 extending therethrough, said orifice registeringwith the aforesaid pas-' sageway 14.

19 is a plug threaded into the said orifice and provided with the vents20 extending therethrough.

y 21 is a compression spring inserted between the conical valve 15 andthe plug 19.

22 is an orifice adapted to extend into the passageway 12 and providedwith the enlarged head 23 having a central orifice 24 registering withthe interior of the sleeve.

25, 25 are radially extending slots cut in the upper face of theenlarged head 23 and extending to the central orifice 24 therein.

26 is a spring surrounding the orifice 22 and situated between theenlarged head 23 and threaded boss 27 on the upper end of the shank 7.

28 is a cup washer extending around the shank 7 and held in place by thenut 29 threaded on the said shank.

is a passageway extending between the aperture 8 in the portion 5 andthe exterior of said portion, and terminating at its outer end in anenlarged internally threaded portion 31. I

32 is a pipe connected to the water service or to a tank, as the casemay be.

33 is an externally threaded sleeve adapted to be screwed into theinternally threaded seat on the valve seat 35 and provided with arectangular shank 40.

41 is a spring interposed between the plug 37 and the valve 39.

42 is a bed suitably secured to the table 43 of the hydraulic press.

44 is one of the embossing dies for the knife handle, said embossing diebeing held in place on the bed by the billet 45.' It is to be understoodthat the die 44 is stationary.

46 is the other die suitably secured to the billet 47 and adapted tomove laterally as will hereinafter appear.

48 is a vertical aperture extending through the billet provided with aprotuberance registering with an aperture 50 in the table 43 when thedies are in the position shown in Fig. 3.

51 is a depending lever rigidly secured to the portion 5 and having theoffset end 52 adapted to extend into the aperture 48 and consequently tocontrol themovement of the billet 47 and the die 48 upon the verticalmovement of the table 43.

53 is a seamless knife handle blank interposed between the dies 44 and46.

54 is a rubber sleeve inserted into the upper end of the handle blank 53and adapted to prevent the escape of water between the handle and thewalls of the orifice 18. Under ordinary circumstances the application ofhydraulic pressure on the handle blank 53 will cause the upper edgethereof to expand sufficiently to prevent this escape of water, but insome instances it is found that this expansion is not sufficient to prevent the total escape of water and conse quently the rubber tube 54 isemployed which absolutely prevents any water running down between thehandle and the walls of the orifice.

The operation of the device is as follows When the table 43 is in thelowermost position the dies are sufficiently separatedas to permit theintroduction of the seamless handle blank 53 between them. The handleblank is first filled with water and is then inserted between the dies44 and 46. When this has been done the water is turned on into the lowerram which causes the same to move up and consequently move the table 43,the bed 42 and the dies in an upward direction. When the table has movedup a requisite extent the offset end of the lever 51 comes intoengagement with the aperture 48 in the billet 47 and upon furthermovement of the table in an upward direction the main portion of thelever 51 engages the inner wall of the aperture 48 thus pressing thebillet and attached die 46 firmly against the handle-blank 53. The tablethen moves slowly up and the upper end of the blank enters the orifice18 in the plug 17 of the upper ram. When this takes place the upper ramseats on the dies and consequently is moved up'with the further upwardmovement of the table. As this upward movement of the rain takes placethe sleeve 22 is depressed as the head 23 thereof comes into engagementwith the top of the aperture 8 in the portion 5, and as the aperture 8,the passageway 30 and the orifice 36 are filled with water any air thatis in the aperture 8 will be forced down through the interior of thetube 22 out through the bottom of the ram. Thus all air will be excludedand consequently upon further upward movement of the ram the water willbe forced down through the tube 22, the passageway 12 opening theconical valve 15 and thence wlll pass through the enlarged passageway 14through the vents 20 into the handle 53 and will cause the walls of suchhandle to be pressed into the indentures in the dies. The instant thehydraulic pressure reaches the top of the handle the rim thereof will beexpanded and will prevent the leakage of water between. the handle andthe walls of the orifice 18. This will complete the embossing operation.The pressure is now released and the table will. fall. As this takesplace the lever 51 is drawn out of the aperture 48 and the shoulder onthe outside of the offset end 52 engages the protuberance 49 on the wallof the aperture 48, thus moving the billet and die 46 outwardly uponfurther downward movement of the table and permitting the embossedhandle to be removed.

It may be pointed out that the spring held conical valve 15 is equal tothe ordinary city or service pressure, and consequently immediately thehydraulic pressure is released this valve will automatically close.Further the spring held conical valve 39 Wlll open upon the applicationof the city or service pressure but will be automatically closedimmediately the upper ram commences its operation.

While I have described my device as applied to the ordinary hydraulicpress and in which instance I introduced the water into the upper ram inthe manner shown above it is to be understood that if I were toconstruct a machine especially for the purpose set forth above I wouldintroduce the water through the head 2 of the machine and thus wouldobviate the necessity for the sleeve 22 as no air would be pocketed inthe top of the aperture 8 in the portion 5.

What I claim as my invention and desire to secure by Letters Patentis 1. In a machine for embossing seamless knife handles, the combinationwith a lower hydraulic ram, a table mounted thereon, said tablereciprocated by the hydraulic ram, and the head of the machine, ofsuitable embossing dies holding the handle blank, a vertical aperture inthe head of the machine, an upper hydraulic ram having a suitable stemextending into the aperture, and a passageway through the ram and stem,a spring actuated valve in the stem, a sleeve freely mounted in thepassageway in the stem, an enlarged head therefor having an orificecommunicating with the interior of the sleeve, and radial slots in theupper surface of the head extending to the orifice therein.

2. In a machine for embossing seamless knife handles, the combinationwith a lower hydraulic ram, a table mounted thereon, said tablereciprocated by the hydraulic ram, and the head of the machine, ofsuitable embossing dies holding the handle blank, a vertical aperture inthe head of the machine, an upper hydraulic ram having a suitable stemextending into the aperture, and a passageway through the ram and stem,a spring actuated valve in the stem, the head of the machine having across passageway extending from its exterior to the aperture therein,and a spring actuated valve in said passageway closing against backpressure upon the upper ram'moving upwardly in the aperture.

3. In a machine for embossing seamless knife handles, the combinationwith a lower hydraulic ram, a table mounted thereon, said tablereciprocated by the hydraulic ram, and the head of the machine, ofsuitable embossing dies holding the handle blank, a vertical aperture inthe head of the machine, an upper hydraulic ram having a suitable stemextending into the aperture, and a passageway through the ram and stem,a spring actuated valve in the stem, the head of the machine having across passageway extending from its exterior to the aperture therein,and a spring actuated valve in said passageway closing against backpressure upon the upper ram moving upwardly in the aperture, and meansupon the upward movement of the upper hydraulic ram for expelling theair in the aperture therethrough.

4. In a machine for embossing seamless knife handles, the combinationwith a lower hydraulic ram, a table mounted thereon, said tablereciprocated by the hydraulic ram, and the head of the machine, ofsuitable embossing dies holding the handle blank, a vertical aperture inthe head of the machine, an upper hydraulic ram having a suitable stemextending into the aperture, and a passage way through the ram and stem,a spring actuated valve in the stem, the head of the machine having across passageway extending from its exterior to the aperture therein,and a spring actuated valve in said passageway closing against backpressure upon the upper ram moving upwardly in the aperture, a sleevefreely mounted in the passageway in the stem, an enlarged head thereforhaving an orifice communicating with the interior of the sleeve, andradial slots in the upper surface of the head extending to the orificetherein.

5. In a machine for embossing seamless knife handles, the combinationwith a lower hydraulic ram, a table mounted thereon, said tablereciprocated by the hydraulic ram, and the head of the machine, ofdivided embossing dies adapted to hold the handle blank between them,one of the dies secured to the table and the other laterally movable inre lation to the table and provided with a protuberance on the outerwall of such aperture, and a depending lever secured to the head of themachine and having an offset lower end adapted to enter the slot in themovable die for moving the same laterally upon the operation of themachine.

In testimony whereof, I have signed at the city of Hamilton, in thecounty of Wentworth, in the Province of Ontario, Canada, this 20th dayof May 1914.

ROBERT EMMET DEVINE.

Witnesses:

J. E. M. FETHERSTONHAUGH, E. M. NEAME.

